Granted Patent
Utility
US 4,151,394 · App. 04/874,153
Guidance system for arc welder
Inventor:
Shelby Cecil
Patented Case
View Patent ↗
Granted: Apr 24, 1979
Filed: Nov 5, 1979
Inventor
Shelby Cecil
Assignee (at issue)
The Cecil Equipment Co.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.